Premium
Magnetic Skyrmions in a Hall Balance with Interfacial Canted Magnetizations
Author(s) -
Zhang Jingyan,
Zhang Ying,
Gao Yang,
Zhao Guoping,
Qiu Lei,
Wang Kaiyou,
Dou Pengwei,
Peng Wenlin,
Zhuang Yuan,
Wu Yanfei,
Yu Guoqiang,
Zhu Zhaozhao,
Zhao Yunchi,
Guo Yaqin,
Zhu Tao,
Cai Jianwang,
Shen Baogen,
Wang Shouguo
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201907452
Subject(s) - skyrmion , condensed matter physics , ferromagnetism , materials science , spintronics , antiferromagnetism , hall effect , coupling (piping) , magnetic field , physics , quantum mechanics , metallurgy
Magnetic skyrmions are attracting interest as efficient information‐storage devices with low energy consumption, and have been experimentally and theoretically investigated in multilayers including ferromagnets, ferrimagnets, and antiferromagnets. The 3D spin texture of skyrmions demonstrated in ferromagnetic multilayers provides a powerful pathway for understanding the stabilization of ferromagnetic skyrmions. However, the manipulation mechanism of skyrmions in antiferromagnets is still lacking. A Hall balance with a ferromagnet/insulating spacer/ferromagnet structure is considered to be a promising candidate to study skyrmions in synthetic antiferromagnets. Here, high‐density Néel‐type skyrmions are experimentally observed at zero field and room temperature by Lorentz transmission electron microscopy in a Hall balance (core structure [Co/Pt] n /NiO/[Co/Pt] n ) with interfacial canted magnetizations because of interlayer ferromagnetic/antiferromagnetic coupling between top and bottom [Co/Pt] n multilayers, where the Co layers in [Co/Pt] n are always ferromagnetically coupled. Micromagnetic simulations show that the generation and density of skyrmions are strongly dependent on interlayer exchange coupling (IEC) and easy‐axis orientation. Direct experimental evidence of skyrmions in synthetic antiferromagnets is provided, suggesting that the proposed approach offers a promising alternative mechanism for room‐temperature spintronics.